More than three million cu yards of coal ash have been excavated from the site of a 2008 spill at the Tennessee Valley Authority's Kingston, Tenn., powerplant, the utility said last month. The ash will be permanently stored on-site in a 240-acre reinforced-containment cell surrounded by an earthquake-resistant retaining wall tied 70 ft deep into bedrock. The wall, designed by Stantec, is being built by contractor GUBMK, Louisville. Workers are placing a liner over the containment cell, which will be capped. Work should be completed by late 2014. About 5.4 million cu yards of ash spilled from a containment cell across 300 acres and into the Clinch River.
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